Boris FX Boris Calligraphy Vresion 2.0 Guía de usuario descargar pdf (Pagina 499)

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101

Working with the Corner Pin Tracker

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Setting Target and Search Regions

Once you set up the timeline to produce the desired effect, you need to specify the points

that you want to track. For each of the four trackers, a Target and Search region must be

defined in the Motion Tracker Source track. The Target region indicates the area to track.

The Search region indicates the area that the filter should search for the target. For best

results, one of the four trackers should be targeted on each corner of the region to replace.

To set Target and Search regions:

1. Click the Preview Monitor icon in the Motion Tracker filter track to open a Preview

window. The Preview window shows the media in the Motion Tracker Source track and

the onscreen controls for Target and Search regions of the motion tracker currently

selected in the Search/Target tab in the Controls window—see “Search/Target Tab

(Corner Pin Tracker)” on page 515.

2. Select the first keyframe in the Source track. Position the Search and Target region of

tracker one on one of the corners of the area to replace. You can adjust the position of

the Search and Target regions either by dragging the onscreen controls, or by using the

parameters in the Search/Target tab in the Controls window.

In the Preview window, you can drag the handles of either region to adjust its size and

shape. Drag inside the Target region to move both regions at once. Drag between the

regions to move the Search region.

3. In the Controls window, select the second tracker tab. Position tracker two’s Search and

Target regions over another corner of the area to be replaced.

4. Repeat Step 3 with the third and fourth trackers, so that one tracker is positioned over

each corner of the area to replace.

Tips for Selecting Target and Search Regions

• A good Target region contains a high-contrast object with good vertical and horizontal

edge definition. Ideally, you should find a pattern that is visible in every frame.

Target region

Search region

Center Point

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